Watch bit of EastEnders after Red Dwarf ? (5)
I believe the answer is:
stare
'watch' is the definition.
(thesaurus)
'bit of eastenders after red dwarf ?' is the wordplay.
'bit of' suggests taking the first letters.
'after' is a charade indicator (letters next to each other).
'red dwarf ?' becomes 'star' (red dwarf is a kind of star).
The first letter of 'eastenders' is 'e'.
'e' put after 'star' is 'STARE'.
(Other definitions for stare that I've seen before include "Look hard" , "Look with fixed eyes" , "Rates (anag.)" , "Gaze fixedly" , "'Look fixedly, without blinking (5)'" .)